assertion  retraction  graph  subject            predicate    object                   datatype    annotation
1          0           graph  oio:creation_date  IAO:0000115  Date class was created.  xsd:string  "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://www.geneontology.org/formats/oboInOwl#creation_date""}]}"